Operation
38
Fishfinding Display Operations
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Adjusting Gains
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Adjusting Gains with the [GAIN] Control
Two [GAIN] controls are available, one for adjusting the high-frequency
receiver gain and the other for adjusting the low-frequency receiver gain.
Turn the [GAIN] controls to adjust the display screen gains for the
corresponding group of frequencies. Turning the [GAIN] controls clockwise
(in the direction of increasing values) increases the gains.
Normally, use the [GAIN] control between positions 3 and 4.
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Adjusting Gains by Setting the STC Mode
Gains can be adjusted by changing STC modes. Four STC modes available
are 50 m, 100 m, 150 m, and 200 m. Set 150 m in most situations. The 200
m setting is suited for displaying larger fish schools.
Lower settings help display smaller fish schools with clarity.
To change STC modes, follow these steps:
1.
Press the
and
keys at the same time to call up the
fishfinding menu.
2.
Using the
or
key, move to “9. STC MODE.”
3.
Press the
or
key to move to the range of your choosing.
4.
Press the
GRAPH
key to return to the fishfinding display.
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Adjusting Gains with the [STC] Control
Two [STC] controls are available, one for adjusting the high-frequency
receiver gain and the other for adjusting the low-frequency receiver gain.
They serve to suppress noise associated with fine dusts and bubbles drifting
near the sea surface. Turn the [STC] controls to adjust the display screen
gains for the corresponding group of frequencies. Turning the [STC]
controls clockwise suppresses noise with greater power.
Normally, use the [STC] control center position.
To adjust [STC], follow these steps:
1.
Remove the rubber cap marked “STC.”
2.
Turn the trimmer control in the hole with a small screwdriver: right
hand hole for high frequency, left hand hole for low frequency.
3.
Put back the rubber cap.
1.COLOR REJ. ≫
2.WHITE LINE ≫ LO FRQ OFF HI FRQ OFF
3.ADJUST FREQ. ≫ LO FRQ 50.0 HI FRQ 200.0
4.TX PULSE WIDTH LONG SHORT
5.TX CYCLE MODE SYNC. ASYNC.
▲ 6.ADJUST TX CYCLE 0
▼ 7.ＰＤＣ HI FRQ Ａ Ｂ Ｃ Ｄ
LO FRQ Ａ Ｂ Ｃ Ｄ
8.ADC MODE BLU 1 2 3 4 5 STD 7 8 RED
9.STC MODE
50 100 150 200 (m)
10.EXT INPUT DISP OFF DISP ON
11.SIG.PROCESS OFF 1 2
12.SCROLL STEP 1 2 3
GRAPH
:
RETURN TO F/F
MARK
:
GOTO SUB MENU≫
Fishfinding Menu
9.STC MODE
Low frequency
High frequency
